Vibration in 1st gear

[Junior]

Just got a new 2024 GT from a dealer that never sold it. Got a good deal on it.
Took her out for a little "getting to know you" ride today and noticed a vibration in 1st gear at about 2600 rpm / 25 mph. It feels like it's coming from the engine, could feel the vibration in my butt. Other than that, really smooth through the rest of the gears and RPM ranges.

Wondering if anyone else has experienced this, and welcome any thoughts from the knowledgeable people on this forum.

Maybe it's normal. Googled it and here's what it found:

 

[Kevin frazier]

1st gear and 2600 rpm should only be used when absolutely necessary, gonna need you ro send it up to 5000rpms as swiftly as possible, let it fly into 2nd gear repeating the process. A rocket was not built to feel a vibration in your butt at 2600rpm in 1st. Send it Doug! Ride that thang, and never again in 1st gear at 2600rpm youve been warned.

 

[Kevin frazier]

Congrats on new hot rod!

 

[Junior]

Thank you Kevin!

 

[Kiwicol]

My butt has so much padding I don't feel any vibrations until waay up in the revs. She gets a bit buzzy at 180 - 200k's

 

[Frosty Rider]

That should smooth out around the 250 to 280km/h range, but the wind buffering will pick up a bit, and give yourself plenty of room to change lanes if needed

 

[Jagster]

I don't notice any vibration. It's super smooth all the way through the rev range, in all gears.
That said, the engine does have the classic 3-cylinder firing characteristic, which I can sense, but it's pretty subtle.

During hard acceleration, particularly pulling up hill, you can feel the transmission thrumming a bit in the low gears...
...I think it's referred to as 'the monster gnashing it's teeth'

 

[mexican]

Did you just get a new and improved, lighter and smaller rocket with a bigger engine??? Pictures please!!!

 

[Nashvegas]

Did you just get a new and improved, lighter and smaller rocket with a bigger engine??? Pictures please!!!

Yes, we need pics!